High-tension-rectifying apparatus



N. V. FEDOTOFF.

HIGH TENSION RECTJFYINC APPARATUS.

APPLlcArloN msn MAR. 22. Isla.

1,382,965. Patented June 28, 1921.

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NICHOLAS V. FEDOTOFF, OF liBJOOKLYN', NEYV YQRK. f

HIGH-TENSIONIRECTIFYING APPARATS.

I T o all 'whom-it may concern.' Be it known that I, NICHOLAS V. Fano- TOFF, a Russian subject, 'residing in the borof which the following is a ough of Brooklyn, county of Kings, and State of New York, have invented a new and useful High-Tensiomliectifying Apparatus,

specification.

.The invention has for an object to provide an apparatus for rectifying polyphase alternating current, whereby unidirectional current will be obtained which is substantially constant, or non-fluctuating, even though the apparatus be subjected to high potentials.,v l a Another object of the invention is to construct 4the rectifyin apparatus in such manner as to avoid as gar as possible the occurrence of undue arcing at high potentials, particularly by means of the character of the switching devices and contact members employed, and their disposition relative to each other,

Another object of the invention is to provide a rectifying apparatus wherein the moving or rotating parts will be as simple and strong as possible, and having fixed contacts so arranged that the connections between the several phases may be readily made, as well as the circuit changes between contacts of the same phase, to the end that the apparatus will not be unduly complicated, and will stand long continued use at high potentials without undue injury or deterioration.

Further objects and advantages of the invention will be in part obvious and in part specifically pointed out in the description hereinafter contained which, taken in connection with the accompanying drawings, discloses a preferred embodiment of the invention: such embodiment, however, is to be considered merely as illustrative of its principle. In the drawings:

Figure 1 is a somewhat diagrammatic view of an apparatus made in accordance with the invention, and applied to a three-phase circuit. I

Fig. 2 is a similarI view of Ythe same apparatus" shown :Ingularly displaced 1800 (as regards the polyphasc current) from the position of Fig. 1.

The invention is disclosed :Is applied lo a three-phase circuit haring primary coils l, Il, lll` together-with cooperating secondary windings having terminals l, 2; 3, 4; and 5, 6 respectively..

-Spccieation of Letters Patent.

Patented June 28, `1921.

Application med irma 22, 191s. serial no. 223,975.

In accordance with the present invention, the rectl'fymg apparatus comprises a switchmg devIce which maintains the secondary polyphase wlndings at all times in series wIth one another, but reverses the connection o'f each winding at the time when the directIon of alternatin current therein changes, with lthe result t made up of th'ecomponents'derived from the several phases, is unidirectional. When the apparatus Is used at high potentials, if undue arcmglshould occur 1n the switching device when the connectionsto the several phases are being reversed, or if a substantial fraction of a wave in any phase should be cut out of circuit in order to avoid arc- Ing, the unidirectional current derived from the windings would fluctuate unduly, partlcularly at the times when the direction of current is changing in the windings.

Furthermore, unduearcing tends to cause rapid deterioratom `of the insulation 4employed in connection with the switching device, and 'to burn into the metallic contact members so as to shorten the life paratus.

.It is accordingly thepurpose of the present invention to construct the switching device in such manner that the occurrence of arcing at high potentialswill be avoided :is much as possible, and to provide a structure wherein the difficulty .of insulating the conducting parts will be minimized.

Referring to the drawings, I provide a plurality of fixed 7contact; members 1, B1; b2, B2; and b", Ba .respectively connected to the terminals 1, 2; 3, 4; and 5, 6 of the secondary windings in the several phases, such contacts being preferably arcuate in shape and arranged concentrically about a rotary shaft O, which is later more fully described` There is associated with each of the above mentioned fixed contact members, a set of contacts'which will be referred to as of positive sign or negative sign, according to the direction of current therein; that is to sav, in connection with the contact member l5* there is provided`a set of fixed contacts comprising the Acontact aof positive sign and contact c1 of negative sign, while with the Contact member B* there is associated a set of fixed contacts comprising the contact C1 of positive sign and the contact A* of negative sign; and similarly the contacts b', B; b3 and Bf are each associated withsets of contacts comprising respectively' the conat the derived current,.

of the apsimple, and the apparatus as a whole ofY The terms contacts and"contact mem-v bers should be understood as including apparatus in which the bridging members do not physically engage the stationary elementsl al, b1, c1, and A1, B1, CJ. etc., since the invention is adapted for operation as a rcctiier of the spark gap type, as well asV to be embodied in structures where the bridging members actas wiping contacts.

Thile a specific embodiment of the invention has been described, it is obvious that many changes may be made without departing from the spirit of the invention, as specified in the following claims:

I claim i y l. A high tension rectifying apparatus comprising polyphase windings each having a plurality of terminals, fixed Contact members each adapted to be connected to one of said terminals, a set of fixed contacts of positive and negative sign associated with cach of said fixed contact membersy, the contacts of positive sign in one phase being connected to the contacts of negative sign in an ad'acent phase, and means cornprising mova le bridging members associated with the contacts and cpntact members of the several phases, for vmaintaining the windings of all phases in series circuit connection and reversing the'connection in circuit of each winding whenever the direction of current changes therein.

2, An apparatus for producing unidirectional current frorn the windings in the several phases of a polyphase circuit, comprising polyphase windings each having a lurality of terminals, fixed contact mem ers each connected to one of the terminals of each of said windings, sets of fixed contacts of positive and negative sign associated with said contact members, bridging members adapted to connect said contact members selectively with the positive and negative contacts of said sets of contacts, and means for actuating said bridging members to change the connection of each of said contact members whenever the direction of current chang in the corresponding winding, said sets of contacts being interconnected to place all of said windings in series.

3. An apparatus for producing unidirectional current from the windings in the several phases of a olyphase circuit, comprising polyphase windln rs each having a pflanrality of terminals, f'illrcdk contact mem rs cach connected to one of the terminals of each of said windings, sets of fixed contacts of positive and negative sign associated with said contact members, bridging members adapted to connect said contact members selectively with the positive and negative con` tacts of said sets of contacts, and means for actuating Said bridging members to change the connection of veach of said Contact members whenever the direction of current changes in the corresponding winding, said sets of contacts being interconnected to place all of said windings in series, means being provided whereby the points at which circuit is made and broken by said bridging members, are spaced apart a relatively large distance.

4. A high tension rectifying apparatus comprising polyphase windings, switching means for maintaining a series circuit connection between the windings of the several phases and reversing the connection of each winding whenever the direction of current therein changes, said switching means cornprising ixed contact members respectively t connected to the windings, and fixed contacts in each phase associated with said fixed contact members, but electrically t erefrom, electrical connections extending between fixed contacts in different phases,

together with rotatable bridging members adapted to shift connection between said fixed contacts and contact members.

5. A high tension rectifying apparatus comprising polyphase windings each having a plurality of terminals, contact members each connected to one of said terminals, sets of contacts of positive and negative sign associated with each of said contact members and disposed on opposite sides thereof, sets of bridging members associated with each winding and operable selectively to bridge the space between the contact members and.

the contacts of positive and negative sign, the sets of bridging members being angularly displaced and operating to reverse the connection in circuit of the windings whenever the direction of current changes therein, said sets of contacts being interconnected to maintain all of said windings in series connection.

6. A rectifying apparatus for use with alternating current windings, comprising fixed contact members each ada ted tobe lconnected to terminals of the win ings, fixed contactsof positive and negative sign disposed respectively on opposite sides of said contact members, and a plurality of rotatable bridging members adapted selectively to make circuit between the contact members and their respective contacts, said bridging members extending in opposite directions from said fixed contact members.

7, A rectifying apparatus for use with polyphase windin comprising fixed contact members each a apted to be connected to insulated terminals of the windings, fixed unidirectional current contacts of positive und negative sign disposed respectively on opposite sides of said Contact members, e, plurality o'f rotatable bridging,r members adapted selectivelyto make circuit between the Contact members and their respectiveeontucts, said brid, ;`i|1; r members extending in opposite directions from said Fixed Contact members, :ind stationary condurtons interconnectim7 'the contacts of the several phases to place a l thi` phases in series.

S. A high tension iectifying apparatus Afor use in connection with polyphziseA windings, comprising fixed members adapted to lpolyphnse windingsjs rectified in series and be connected respectively to the opposite terminuls of the several phase windings, fixed members disposed on alternate sides .of said tiret mentioned fixed members,some of which are interconnected in pairs with each other und some in pairs with the terminals of av direct current circuit and means comprising movable bridging members adapted to connect Suid first mentioned fixed members with one or the yother of said alternately arranged fixed members,'in accordance with direction'v of current How in said first mentioned members, whereby currentderiyed vfrom several maintained at constant polarity on saididirect current circuit termlnals. i n NICHOLAS V. FEDOTQFF; 

